WSR 97-16-114
PROPOSED RULES
BUILDING CODE COUNCIL
[Filed August 6, 1997, 10:34 a.m.]
Original Notice.
Preproposal statement of inquiry was filed as WSR 97-06-107.
Title of Rule: Adoption of chapters 51-46 and 51-47 WAC, adoption and amendment of the 1997 Edition of the Uniform Plumbing Code and Plumbing Code Standards; and repealing chapters 51-26 and 51-27 WAC, adoption and amendment of the 1991 Edition of the Uniform Plumbing Code and Plumbing Code Standards.
Purpose: To consider whether to adopt, or amend and adopt, the 1997 Edition of the Uniform Plumbing Code and Plumbing Code Standards, published by the International Association of Plumbing and Mechanical Officials, and repeal the 1991 edition of these codes.
Statutory Authority for Adoption: RCW 19.27.031, 19.27.074.
Statute Being Implemented: Chapters 19.27 and 34.05 RCW.
Summary: The proposed rules include adoption of the 1997 Edition of the Uniform Plumbing Code and Standards, with amendments (including Appendix I, Installation Standards), and repeal of the 1991 edition. See Explanation of Rule below for further information.
Reasons Supporting Proposal: RCW 19.27.031, 19.27.074.
Name of Agency Personnel Responsible for Drafting and Implementation: Lori Graham, P.O. Box 48300, Olympia, WA 98504-8300, (360) 753-4308; and Enforcement: Local jurisdictions.
Name of Proponent: Washington State Building Code Council, governmental.
Agency Comments or Recommendations, if any, as to Statutory Language, Implementation, Enforcement, and Fiscal Matters: The council is seeking comments on the issues and options proposed in the rule.
Rule is not necessitated by federal law, federal or state court decision.
Explanation of Rule, its Purpose, and Anticipated Effects: The proposed rule will adopt by reference and amend the 1997 Edition of the Uniform Plumbing Code and Uniform Plumbing Code Standards (UPC), published by the International Association of Plumbing and Mechanical Officials (IAPMO). The purpose is to replace the 1991 UPC (chapters 51-26 and 51-27 WAC), which will then be repealed, and assign the 1997 UPC new Washington Administrative Code (WAC) numbers (chapters 51-46 and 51-47 WAC). The 1997 UPC (proposed chapters 51-46 and 51-27 WAC) will be amended to provide greater safety and flexibility than the published version for its application in Washington state.
Regulatory Review: In compliance with Executive Order 97-02, Regulatory improvement, the following criteria for regulatory review will be considered at the time of final adoption of the rule.
1. Need. This rule is necessary to comply with the requirements of RCW 19.27.074. The council must regularly review updated versions of the Uniform Plumbing Code, and amend and adopt as deemed appropriate by the council. An updated, 1997 version of the Uniform Plumbing Code has been published. The purpose and objective of this review, as given in RCW 19.27.020, is to promote the health, safety and welfare of the occupants or users of buildings; to require minimum construction standards for the state of Washington; to permit the use of modern technical methods; to eliminate restrictive, obsolete, conflicting, duplicating and unnecessary regulations; and to provide standards to make buildings accessible to and usable by physically disabled persons. The technical advisory groups appointed by the council have identified rules that are obsolete, duplicative or ambiguous, and have proposed amendments and revisions.
2. Effectiveness and Efficiency. The mission of the council is to adopt building codes for uniform application throughout the state. In the course of the regular rule review, the council examined regulatory alternatives and new technologies. The council has identified where alternatives can be used effectively and efficiently. The council efficiently achieves uniform state building codes by serving as the central administrative agency for state-wide adoption of building codes.
3. Clarity. The council is revising their filing procedure for state amendments to the national uniform codes. To enhance clarity, only those subsections with a state amendment will be filed under the main section number. The balance of the main section will remain as written in the national uniform code, as adopted by reference, unless otherwise noted. This reformatting change reorganizes and shortens the WACs, and necessitates new WAC number assignments.
4. Intent and Statutory Authority. The proposed rule is consistent with the legislative intent of the statute chapter 19.27 RCW. The statute gives the council sufficient authority to maintain the state building code, and to amend and adopt new editions of the Uniform Plumbing Code. The Uniform Plumbing Code is published every three years.
5. Coordination. The council rule-making process has included participation by national, state, and local building, fire, mechanical and plumbing officials, as well as state agency representatives for the Departments of Social and Health Services, Health, Labor and Industries, and the state Fire Marshal. The council actively seeks participation from other state agencies to assure that duplication and inconsistency is eliminated.
6. Cost. The council appointed technical advisory groups and an Economic and Regulatory Assessment Committee to examine the costs and benefits associated with the revisions to the building codes.
7. Fairness. The state amendments to the Uniform Plumbing Code proposed by the council are intended to mitigate disproportionate impact on the regulated community. The council is made up of representatives from the regulated community, as well as public and regulatory officials. In addition, the council enlisted the assistance of technical advisory groups, made up of the individuals, organizations and businesses impacted by the building codes, to review code changes and proposals.
Proposal Changes the Following Existing Rules: Summary of Changes Proposed in Amendments to the 1997 UPC: Chapter 51-46 WAC:
1. Sections 001, 002, 007, 008, these sections maintain existing state-wide amendments, correcting section references and dates.
2. Section 003, this change updates the adopting language, allows conformance with chapter 19.27 RCW and maintains the intent of that law. This section mandates that Chapters 11 and 12 are not adopted. It also mandates that the portions of the code addressing venting and combustion air of fuel fired appliances and those portions addressing building sewers not be adopted.
3. Section 101.4.1.4, this section is not adopted. This requirement is in direct conflict with chapter 19.27 RCW, which sets specific code precedent.
4. Section 102.4, add a subsection outlining an appeal process. The Plumbing Code does not currently contain an appeals process. This amendment brings the code into conformance with the other model codes.
5. Section 103.1.3, revise requirements to eliminate concerns that the section as written would cause conflict with the licensing requirements under chapter 18.106 RCW.
6. Section 205, delete the definition of Combustible Construction. The definition is extraneous. Add a definition for CPVC. The Plumbing Code as written does not define CPVC.
7. Section 215, add a definition for Medical Gas. The Plumbing Code as written does not define medical gas.
8. Section 218, add a definition for PEX. The Plumbing Code as written does not define PEX. Add a definition for PP. The Plumbing Code as written does not define PP. Modify the definition of Plumbing System by removing references to fuel gas piping, building sewers, and venting for water heaters. The Plumbing Code does not have jurisdiction over these items. Under the definition Public or Public Use, add definitions for General Use and Heavy Use. These terms are currently defined in Table 6-4, Footnotes 5 and 6.
9. Section 301.1.1, proposed change modifies existing language to require that all materials meet nationally recognized standards.
10. Section 301.1.3, editorial language change eliminates extraneous language and refers users to appropriate code sections.
11. Section 310.4, proposed change adds a reference to manufacturer's installation requirements. In order to ensure product integrity and maintain product guarantee, the manufacturer's installation instructions must be followed.
12. Section 311.4, maintain existing state amendment, correcting section references.
13. Section 313.6, maintain existing state amendment, correcting section references.
14. Section 313.10.4, amendment gains consistency with the Building Code.
15. Section 314.5, this change, like that to Section 310.4, stresses the need to follow manufacturer's installation requirements. This is necessary for product integrity.
16. Section 316.1.5, this change, like that to Section 310.4 and 314.5, stresses the need to follow manufacturer's installation requirements to ensure product integrity.
17. Table 3-2, add PEX to the suspending support table.
18. Section 402, the water conservation requirements are being moved from Chapter 18 to Chapter 4. This amendment is the current state amendment with one substantive change. The change amends the current water closet exception for day care facilities to exempt all commercial facilities from the 1.6 gpf requirement. Currently, RCW 19.27.170 mandates that the council adopt rules requiring 1.6 gpf water closets in all new construction and remodeling involving the replacement of plumbing fixtures in residential, hotel, motel, school, industrial, commercial use, or other occupancies determined by the council to use significant quantities of water. The proposed change requires a legislative change prior to being enacted.
19. Section 412.2, maintain section, deleting reference to commercial kitchens. This proposal may increase construction costs for buildings constructed with wood floors.
20. Section 413.0, delete the minimum plumbing fixture requirements from the Plumbing Code and refer the user to the Building Code. The Building Code contains the requirements for the minimum number of plumbing fixtures. The Building Code takes precedence over the Plumbing Code.
21. Section 501.0, amend the General section to refer to the Mechanical Code for venting and combustion air issues. In addition, add a new paragraph to the general section prohibiting the use of a standard water heater as a space heater. Parallel language is being added to the Mechanical Code.
22. Section 502.8, delete the definition of Vent. The Mechanical Code takes precedence over venting requirements.
23. Section 502.9, delete the definition of Vent Collar. The Mechanical Code takes precedence over venting requirements.
24. Section 505.0, remove references made to hot water boilers. The Washington State Department of Labor and Industries has jurisdiction over hot water boilers.
25. Section 507, this section is not adopted. The Mechanical Code takes precedence over combustion air issues.
26. Section 509.0, alter the prohibitive locations section for water heaters. This change brings consistency with the National Fuel Gas Code. Parallel language is being added to the Mechanical Code.
27. Sections 512 through 525, these sections are not adopted. These sections cover the venting requirements for water heaters. The Mechanical Code takes precedence over these sections and therefore they are being deleted.
28. Sections 603.0, 603.3.2 and 603.4.6.1, amend cross connection control sections to be consistent with the Washington State Department of Health requirements.
29. Section 604.1, this section has been amended to allow the use of PEX. The section was further amended to allow the use of new materials as they are approved and enter the market place. This will avoid the necessity of adding more and more items to the list as new products become available.
30. Section 604.11, this is a new section allowing a water system using plastic pipes and connectors to terminate within the building so long as the connection to the potable water system is close to the point of entry. This will make the system more accessible if a problem occurs in the distribution system. By prohibiting the barbed clamp system, there will be a less likely occurrence of failure. This allowance has been available to mobile home users for some time and has not appeared to cause hardship. A similar allowance is also available in other model codes.
31. Section 608.5, add an exception to deal with the addition of a drain in replacement water heater installations. This exception is added to clarify the drain requirement. The existing language is being interpreted to require a floor drain in existing installations. This exception would only require the drain off the temperature pressure relief valve.
32. Section 609.6, this change corrects a reference error.
33. Section 610.4, this change maintains an existing state-wide amendment and corrects section references.
34. Section 701.1, this change maintains an existing state-wide amendment and corrects section references.
35. Section 704.3, delete section. This change eliminates conflict with Washington State Department of Health requirements.
36. Section 710.3, replace entire section with language from Section 409(c) 1991 UPC. The existing system performs adequately. The increase proposed in the new code appears to be unnecessary.
37. Part II - Building Sewers, Sections 713 - 723 and Associated Tables, delete all of Part II and associated tables. The Washington State Department of Health has jurisdiction over building sewer requirements.
38. Table 7-3, amend drainage requirements for group showers.
39. Section 810.4, change "beehive" to "dome." The term "beehive" was felt to be proprietary.
40. Section 814.0, delete section and refer document user to the Mechanical Code.
41. Section 815.0, delete section and make reference to the Mechanical Code.
42. Section 903.1.2, maintain existing state amendment, correcting section references.
43. Section 1003.1, include the material Polypropylene as an acceptable material for this section. This change includes the use of materials that are accepted in both the ANSI A40 document and the National Standard Plumbing Code.
44. Section 1012.0, this section is not adopted.
45. Chapter 13, replace Chapter 13 with one of two presented options. The main difference between the two options is how the documents reference NFPA 99 and the approach to system testing.
46. Chapter 14, delete the term "Mandatory" from the reference standards. In addition, make the following changes to the Standards table: Add the material PEX to the Above Ground Water Distribution Piping Section, the Joining Material And Methods - Water Supply Systems section and the Water Distribution Piping - Above Ground section. In the Medical Gas Section, change the date of the standard to 1996 and reference Chapters 2 and 4 only.
47. Appendix M, this is a new Appendix containing the requirements for storm drainage as previously found in Chapter 11. The following technical changes have been made to the chapter contents:
Section M 1.3, eliminate the three floor restriction on ABS, PVC and DWV. The restriction is unnecessary. This is also a current state-wide amendment.
Section M 1.2, add pertinent cleanout information that will be deleted with Part II of Chapter 7. The Storm drainage section references Section 719. Section 719 is located in the building sewer portion of the code and therefore will be deleted. In order for the Storm Drainage Appendix to be complete, it must contain the pertinent information from Section 719.
Section M 1.11.2.2, add an exception for roof drain overflow connections. A sister amendment is being made to the Building Code.
Section 1108, this section (1108, Controlled Flow Drainage) is not adopted. The UBC takes precedence over this issue.
Section M 8.2.2, eliminate air-testing restriction for plastic pipe. The concern with the test is with the testing equipment and the equipment's ability to maintain the five psi. Regulating the testing equipment is outside the purview of the code.
Chapter 51-47 WAC.
Sections 51-47-001, 51-47-002, 51-47-003, 51-47-007 and 51-47-008, these sections maintain existing state-wide amendments correcting section references and dates.
No small business economic impact statement has been prepared under chapter 19.85 RCW. The council appointed Technical Advisory Groups (TAGs) to do a comprehensive review and comparison of the 1991 Uniform Plumbing Code and the 1997 Uniform Plumbing Code. The TAGs held meetings over a three-year period. All national and state-wide code changes were examined. The TAG findings were reviewed by the council's Economic and Regulatory Assessment Committee. Based on this review, the council found that all changes proposed are editorial in nature or provide clarification and pose minimal economic impact. Therefore, no small business economic analysis was necessary.
Section 201, chapter 403, Laws of 1995, does not apply to this rule adoption. The state Building Code Council is not listed in this section as one of the agencies required to comply with this regulation.
Hearing Location: On Friday, September 12, 1997, at 9:00 a.m., at the Radisson Hotel, Flight Lounge, 17001 Pacific Highway South, SeaTac, WA; and on Friday, October 10, 1997, at 9:00 a.m., Spokane City Hall, City Council Chambers, West 808 Spokane Falls Boulevard, Spokane, WA.
Assistance for Persons with Disabilities: Contact Krista Braaksma by September 1, 1997, TDD (360) 753-2200, or (360) 753-5927.
Submit Written Comments to: Mike McEnaney, Chair, State Building Code Council, P.O. Box 48300, Olympia, Wa 98504-8300, FAX (360) 586-5880, by October 8, 1997.
Date of Intended Adoption: November 14, 1997.
August 6, 1997
Mike McEnaney
Chair
STATE BUILDING CODE ADOPTION AND
AMENDMENT OF THE 1997 EDITION OF THE
UNIFORM PLUMBING CODE
NEW SECTION
WAC 51-46-001 Authority. These rules are adopted under the
authority of chapter 19.27 RCW.
[]
NEW SECTION
WAC 51-46-002 Purpose. The purpose of these rules is to implement
the provisions of chapter 19.27 RCW, which provides that the State
Building Code council shall maintain the State Building Code in a status
which is consistent with the purpose as set forth in RCW 19.27.020. In
maintaining the codes, the council shall regularly review updated
versions of the codes adopted under the act, and other pertinent
information, and shall amend the codes as deemed appropriate by the
council.
[]
NEW SECTION
WAC 51-46-003 Uniform plumbing code. The 1997 edition of the
Uniform Plumbing Code, published by the International Association of
Plumbing and Mechanical Officials, is hereby adopted by reference with
the following additions, deletions and exceptions: Provided, That
Chapters 11 and 12 of this code are not adopted. Provided further, That
those requirements of the Uniform Plumbing Code relating to venting and
combustion air of fuel fired appliances as found in Chapter 5 and those
portions of the Code addressing building sewers are not adopted.
[]
NEW SECTION
WAC 51-46-007 Exceptions. The exceptions and amendments to the
uniform codes contained in the provisions of chapter 19.27 RCW shall
apply in cases of conflict with any of the provisions of these rules.
[]
NEW SECTION
WAC 51-46-008 Implementation. The Uniform Plumbing Code adopted
by chapter 51-46 WAC shall become effective in all counties and cities
of this state on July 1, 1998, unless local government residential
amendments have been approved by the State Building Code council.
[]
NEW SECTION
WAC 51-46-0100 Chapter 1--Administration.
[]
NEW SECTION
WAC 51-46-0101 Section 101 Title, scope and general.
101.4.1.4 Conflicts Between Codes. Delete paragraph.
[]
NEW SECTION
WAC 51-46-0102 Organization and enforcement.
102.4 Appeals. All persons shall have the right to appeal a decision
of the Administrative Authority. The jurisdiction shall have a board of
appeals to hear and rule on Plumbing Code appeals. Members of the board
shall be appointed by the jurisdiction. Decisions by the board shall be
reported to the jurisdiction and administered by the Administrative
Authority.
[]
NEW SECTION
WAC 51-46-0103 Section 103 Permits and inspections.
103.1.3 Licensing. State or local rules and regulations concerning
licensing which the applicable governing authority has adopted shall
apply.
[]
NEW SECTION
WAC 51-46-0200 Chapter 2 - Definitions.
[]
NEW SECTION
WAC 51-46-0205 Section 205.0 - C.
Combustible Construction. Delete definition.
CPVC - Chlorinated Poly (Vinyl Chloride)
[]
NEW SECTION
WAC 51-46-0215 Section 215.0 - M.
Medical Gas - Compressed gasses at hospitals and similar facilities
intended for inhalation or sedation including, but not limited to,
analgesia systems for dentistry, podiatry, veterinary and similar uses.
[]
NEW SECTION
WAC 51-46-0218 Section 218.0 - P.
PEX - Crosslinked Polyethylene
Plumbing System - Includes all potable water building supply and
distribution pipes, all plumbing fixtures and traps, all drainage and
vent pipe(s), and all building drains including their respective joints
and connection, devices, receptors, and appurtenances within the property
lines of the premises and shall include potable water piping, potable
water treating or using equipment, medical gas and medical vacuum
systems, and water heaters.
PP - Polypropylene
Public or Public Use - All buildings or structures that are not defined
as private or private use.
(1) General use applies to business, commercial, industrial and assembly occupancies other than those defined under heavy use. Included are the public and common areas in hotels, motels and multi-dwelling buildings.
(2) Heavy use assembly applies to toilet facilities in occupancies
which place a heavy, but intermittent time-based demand on the water
supply system, such as schools, auditoriums, stadiums, race courses,
transportation terminals, theaters and similar occupancies where queuing
is likely to occur during periods of peak use.
[]
NEW SECTION
WAC 51-46-0300 Chapter 3 - General regulations.
[]
NEW SECTION
WAC 51-46-0301 Materials - Standards and alterations.
301.1.1 Approvals. Unless otherwise provided for in this Code, all
materials, fixtures or devices used or entering into the construction of
plumbing and drainage systems, or parts thereof, shall be submitted to
the Administrative Authority for approval and shall conform to approved
nationally recognized standards, and shall be free from defects. All
pipe fittings, traps, fixtures, material and devices used in a plumbing
system shall be listed or labeled by a listing agency or shall be
approved by the Administrative Authority.
301.1.3 Standards. Standards listed or referred to in this chapter and
Table 14-1 cover materials that conform to the requirements of this Code,
when used in accordance with the limitations imposed in this or other
chapters thereof and their listing. Where a standard covers materials
of various grades, weights, quality, or configurations, there may be only
a portion of the listed standard which is applicable. Design and
materials for special conditions or materials not provided for herein are
allowed to be used only by special permission of the Administrative
Authority after the Administrative Authority has been satisfied as to
their adequacy in accordance with Section 301.2.
[]
NEW SECTION
WAC 51-46-0310 Workmanship.
310.4 Installation Practices. Plumbing systems shall be installed in
a manner conforming to this Code and the manufacturer's instructions.
[]
NEW SECTION
WAC 51-46-0311 Prohibited fittings and practices.
311.4. Except as hereinafter provided in sections 908.0, 909.0 and
910.0, no vent pipe shall be used as a soil or waste pipe, nor shall any
soil or waste pipe be used as a vent.
[]
NEW SECTION
WAC 51-46-0313 Protection of piping, materials, and structures.
313.6. No water, soil, or waste pipe shall be installed or permitted
outside of a building or in an exterior wall unless, where necessary,
adequate provision is made to protect such pipe from freezing. All hot
and cold water pipes installed outside the conditioned space shall be
insulated to a minimum R-3.
313.10.4 In exterior walls, the annular space between sleeves and pipes
shall be sealed and made watertight.
EXCEPTION: Any pipe sleeve through fire resistive construction shall be sealed with an approved fire-resistive material in accordance with the Building Code.
[]
NEW SECTION
WAC 51-46-0314 Hangers and supports.
314.5 All piping, fixtures, appliances, and appurtenances shall be
adequately supported in accordance with this Code and the manufacturer's
installation instructions and approved by the Administrative Authority.
[]
[Open Style:Columns Off]
NEW SECTION
WAC 51-46-0392 Table 3-2 Hangers and supports.
[Open Style:Columns On]
[]
NEW SECTION
WAC 51-46-0316 Joints and connections.
316.1.5 Solvent Cement Plastic Pipe Joints. Plastic pipe and fittings
designed to be joined by solvent cementing shall comply with this Code
and the manufacturer's installation instructions.
ABS pipe and fittings shall be cleaned and then joined with listed
solvent cement(s).
CPVC and PVC pipe and fittings shall be cleaned and joined with
listed primer(s) and solvent cements.
[]
NEW SECTION
WAC 51-46-0400 Chapter 4 - Plumbing fixtures and fixture fittings.
[]
NEW SECTION
WAC 51-46-0402 Water-conserving fixtures and fittings.
402.0 Water-Conserving Fixtures and Fittings
402.1 The purpose of this Section shall be to implement water
conservation performance standards in accordance with RCW 19.27.170.
402.2 Application.
This section shall apply to all new construction and all remodeling
involving replacement of plumbing fixtures and fittings in all
residential, hotel, motel, school, industrial, commercial use, or other
occupancies determined by the council to use significant quantities of
water. Plumbing fixtures, fittings and appurtenances shall conform to
the standards specified in this section and shall be provided with an
adequate supply of potable water to flush and keep the fixtures in a
clean and sanitary condition without danger of backflow or cross-connection.
402.3 Water Efficiency Standards.
402.3.1 Standards for Vitreous China Plumbing Fixtures.
402.3.1.1 The following standards shall be adopted as plumbing materials,
performance standards, and labeling standards for water closets and
urinals. Water closets and urinals shall meet either the ANSI/ASME
standards or the CSA standard.
ANSI/ASME A112.19.2M-1990 Vitreous China Plumbing Fixtures
ANSI/ASME A112.19.6-1990 Hydraulic Requirements for Water
Closets and Urinals
CSA B45 CSA Standards on Plumbing Fixtures
402.3.1.2 The maximum water use allowed in gallons per flush (gpf) or
liters per flush (lpf) for any of the following water closets shall be
the following:
Tank-type toilets 1.6 gpf/6.0 lpf
Flushometer-valve toilets 1.6 gpf/6.0 lpf
Flushometer-tank toilets 1.6 gpf/6.0 lpf
Electromechanical hydraulic toilets 1.6 gpf/6.0 lpf
EXCEPTIONS: (1) Water closets located in day care centers, intended for use by young children, hospitals, clinics, medical and mental institutions and public restrooms (stadiums, schools, highway rest stops, shopping malls etc.), may have a maximum water use of 3.5 gallons per flush or 13.25 liters per flush.
(2) Water closets with bed pan washers may have a maximum water use of 3.5 gallons per flush or 13.25 liters per flush.
(3) Blow out bowls, as defined in ANSI/ASME A112.19.2M, Section 5.1.2.3 may have a maximum water use of 3.5 gallons per flush or 13.25 liters per flush.
402.3.1.3 The maximum water use allowed for any urinal shall be 1.0
gallons per flush or 3.78 liters per flush.
402.3.1.4 No urinal or water closet that operates on a continuous flow
or continuous flush basis shall be permitted.
402.3.1.5 This section does not apply to fixtures installed before the
effective date of this section, that are removed and relocated to another
room or area of the same building after the effective date of this
section.
402.3.2 Standards for Plumbing Fixture Fittings.
402.3.2.1 The following standards are adopted as plumbing material,
performance requirements, and labeling standards for plumbing fixture
fittings. Faucets, aerators, and shower heads shall meet either the
ANSI/ASME standard or the CSA standard.
ANSI/ASME A112.18.1M-1989 Plumbing Fixture Fittings
CSA B125 Plumbing Fittings
402.3.2.2 The maximum water use allowed for any shower head is 2.5
gallons per minute or 9.5 liters per minute.
EXCEPTION: Emergency use showers shall be exempt from the maximum water usage rates.
402.3.2.3 The maximum water use allowed in gallons per minute (gpm) or liters per minute (lpm) for any of the following faucets and replacement aerators is the following:
Lavatory faucets 2.5 gpm/9.5 lpm
Kitchen faucets 2.5 gpm/9.5 lpm
Replacement aerators 2.5 gpm/9.5 lpm
Public lavatory faucets other than metering 0.5 gpm/1.9 lpm
402.4 Metering Valves.
Lavatory faucets located in restrooms intended for use by the general
public shall be equipped with a metering valve designed to close by
spring or water pressure when left unattended (self-closing).
EXCEPTIONS: (1) Where designed and installed for use by persons with a disability.
(2) Where installed in day care centers, for use primarily by children under 6 years of age.
402.5 Accepted Plumbing Fixtures and Fixture Fittings.
Plumbing fixtures and fixture fittings which are tested in accordance
with the standards listed herein and listed by either the International
Association of Plumbing and Mechanical Officials or the Canadian
Standards Association may be approved by the Administrative Authority for
installation. Under Section 301, the Administrative Authority may
approve plumbing fixtures and fixture fittings, not listed by either the
International Association of Plumbing and Mechanical Officials or the
Canadian Standards Association, PROVIDED the products meet the testing,
and marking and labeling requirements listed in Section 402.3.
The State Building Code council will publish and distribute a
current list of fixtures and fixture fittings that meet the standards
listed within Section 402 and have been listed with either the
International Association of Plumbing and Mechanical Officials or the
Canadian Standards Association.
402.6 Implementation.
402.6.1 The standards for water efficiency and labeling contained within
Section 402.3 shall be in effect as of July 1, 1993, as provided in RCW
19.27.170 and amended July 1, 1998.
402.6.2 No individual, public or private corporation, firm, political
subdivision, government agency, or other legal entity, may, for purposes
of use in the state of Washington, distribute, sell, offer for sale,
import, install, or approve for installation any plumbing fixtures or
fittings unless the fixtures or fittings meet the standards as provided
for in this section.
[]
NEW SECTION
WAC 51-46-0412 Floor drains and shower stalls.
412.2 Location of Floor Drains. Floor drains shall be installed in the
following areas:
412.2.1 Toilet rooms containing two (2) or more water closets or a
combination of one (1) water closet and one (1) urinal, except in a
dwelling unit. The floor shall slope toward the floor drains.
412.2.2 Laundry rooms in commercial buildings and common laundry
facilities in multi-family dwelling buildings.
[]
NEW SECTION
WAC 51-46-0413 Minimum number of required fixtures.
413.0 Minimum Number of Required Fixtures. For minimum number of plumbing fixtures required, see Building Code Chapter 29 and Table 29-A.
[]
NEW SECTION
WAC 51-46-0500 Chapter 5 - Water heaters.
[]
NEW SECTION
WAC 51-46-0501 General.
501.0 General.
The regulations of this chapter shall govern the construction, location, and installation of all fuel burning and other water heaters heating potable water. See the Mechanical Code for combustion air and installation of all vents and their connectors. All design, construction, and workmanship shall be in conformity with accepted engineering practices and shall be of such character as to secure the results sought to be obtained by this Code. No water heater shall be hereinafter installed which does not comply in all respects with the type and model of each size thereof approved by the Administrative Authority. A list of generally accepted gas equipment standards is included in Table 14-1.
Water heaters used for space heating only are prohibited.
[]
NEW SECTION
WAC 51-46-0502 Definitions.
502.8 Vent - Delete definition
502.9 Vent Collar - Delete definition
[]
NEW SECTION
WAC 51-46-0505 Gas-fired water heater approval requirements.
505.0 Gas-Fired Water Heater Approval Requirements.
505.1 Gas fired water heaters shall conform to approved recognized
applicable standards or to other standards acceptable to the
Administrative Authority. Each such water heater shall bear the label
of an approved testing agency, certifying and attesting that such
equipment has been tested and inspected and meets the requirements of
applicable standards.
505.2 Except when reconditioned by the manufacturer or the
manufacturer's approved agent in accordance with its original approval
requirements and reinstalled at its original location, each reconditioned
water heater shall be tested for safety and conformity to approved
standards, and shall bear the label of an approved testing agency
certifying and attesting that such equipment has been tested and
inspected and meets the requirements of applicable standards. Such label
shall also state clearly that the water heater has been reconditioned,
and shall give the name and address of the reconditioner. Every person
applying for a permit to install a used or reconditioned water heater
shall clearly state on the application for permit that such equipment is
used or reconditioned.
505.3 Gas storage-type water heaters shall be provided with, in addition
to the primary temperature controls, an over-temperature safety
protection device constructed, listed, and installed in accordance with
nationally recognized applicable standards for such devices and a
combination temperature and pressure relief valve.
[]
NEW SECTION
WAC 51-46-0507 Combustion air.
507.0 Combustion Air. For issues relating to combustion air, see the
Mechanical Code.
Delete remainder of this section.
[]
NEW SECTION
WAC 51-46-0509 Prohibited locations.
509.0 Prohibited Locations.
Water heaters which depend on the combustion of fuel for heat shall not
be installed in a room used or designed to be used for sleeping purposes,
bathroom, clothes closets or in a closet or other confined space opening
into a bath or bedroom.
EXCEPTION: 1. Direct vent water heaters.
2. Water heaters installed in a closet that has a weather-stripped solid door with an approved door closing device, and designed exclusively for the water heater and where all air for combustion and ventilation is supplied from the outdoors.
3. Water heaters of the automatic storage type installed as a replacement in a bathroom, when specifically approved, properly vented and supplied with adequate
combustion air.
Where not prohibited by other regulations, water heaters may be located
under a stairway or landing.
[]
NEW SECTION
WAC 51-46-0512 Venting of water heaters.
512.0 Venting of Water Heaters Delete entire Section.
[]
NEW SECTION
WAC 51-46-0513 Limitations.
513.0 Limitations Delete entire Section.
[]
NEW SECTION
WAC 51-46-0514 Vent connectors.
514.0 Vent Connectors. Delete entire Section.
[]
NEW SECTION
WAC 51-46-0515 Location and support of venting system.
515.0 Location and Support of Venting System. Delete entire Section.
[]
NEW SECTION
WAC 51-46-0516 Length pitch and clearance.
516.0 Length Pitch and Clearance. Delete entire Section.
[]
NEW SECTION
WAC 51-46-0517 Vent termination.
517.0 Vent Termination. Delete entire Section
[]
NEW SECTION
WAC 51-46-0518 Area of venting system.
518.0 Area of Venting System. Delete entire Section
[]
NEW SECTION
WAC 51-46-0519 Multiple appliance venting.
519.0 Multiple Appliance Venting. Delete entire Section.
[]
NEW SECTION
WAC 51-46-0520 Existing venting system.
520.0 Existing Venting System. Delete entire Section.
[]
NEW SECTION
WAC 51-46-0521 Draft hoods.
521.0 Draft Hoods. Delete entire Section.
[]
NEW SECTION
WAC 51-46-0522 Gas venting into existing masonry chimneys.
522.0 Gas Venting into Existing Masonry Chimneys. Delete entire
Section.
[]
NEW SECTION
WAC 51-46-0523 Installation.
523.0 Installation. Delete entire Section.
[]
NEW SECTION
WAC 51-46-0524 Mechanical draft systems.
524.0 Mechanical Draft Systems. Delete entire Section.
[]
NEW SECTION
WAC 51-46-0525 Venting through ventilating hoods and exhaust
systems.
525.0 Venting Through Ventilating Hoods and Exhaust Systems. Delete
entire Section.
[]
NEW SECTION
WAC 51-46-0600 Water supply and distribution.
[]
NEW SECTION
WAC 51-46-0603 Cross-connection control.
603.0 Cross-Connection Control.
Cross-connection control shall be provided in accordance with the
provisions of this chapter. The Administrative Authority shall
coordinate with the local water purveyor where applicable in all matters
concerning cross-connection control within the property lines of the
premises.
No person shall install any water operated equipment or mechanism,
or use any water treating chemical or substance, if it is found that such
equipment, mechanism, chemical or substance may cause pollution or
contamination of the domestic water supply. Such equipment or mechanism
may be permitted only when equipped with an approved backflow prevention
device or assembly.
603.3.2 The premise owner or responsible person shall have the backflow
prevention assembly tested by a Washington State Department of Health
certified backflow assembly tester at the time of installation, repair,
or relocation and at least on an annual schedule thereafter or more often
when required by the Administrative Authority.
603.4.6.1 Potable water supplies to systems having no pumps or
connections for pumping equipment, and no chemical injection or
provisions for chemical injection, shall be protected from backflow by
one of the following devices:
1. Atmospheric vacuum breaker
2. Pressure vacuum breaker
3. Reduced pressure backflow preventer
4. A double check valve may be allowed when approved by the water
purveyor and the Administrative Authority.
[]
NEW SECTION
WAC 51-46-0604 Materials.
604.0 Materials
604.1 Water pipe and fittings shall be of brass, copper, cast iron,
galvanized malleable iron, galvanized wrought iron, galvanized steel or
other approved materials. Cast iron fittings used for water need not be
galvanized if over two (2) inches (51 mm) in size. Asbestos-cement,
CPVC, PEX, PE, PVC or other approved water pipe materials manufactured
to recognized standards may be used for cold water distribution systems
outside a building. PEX or CPVC water pipe and tubing may be used for
hot and cold water distribution systems within a building. Other
products not listed in this section are acceptable for their intended
use, provided that such materials or distribution systems are listed and
approved in accordance with nationally recognized standards. All
materials used in the water supply system, except valves and similar
devices shall be of like material, except where otherwise approved by the
Administrative Authority.
604.11 Plastic water piping may terminate within a building, provided
the connection to the potable water distribution system shall be made as
near as is practical to the point of entry and shall be accessible.
Barbed insert fittings with clamps are prohibited within the building.
[]
NEW SECTION
WAC 51-46-0608 Water pressure, pressure regulators, pressure relief
valves, and vacuum relief valves.
608.5 Relief valves located inside a building shall be provided with a
drain, not smaller than the relief valve outlet, of galvanized steel,
hard drawn copper piping and fittings, CPVC, or listed relief valve drain
tube with fittings which will not reduce the internal bore of the pipe
or tubing (straight lengths as opposed to coils) and shall extend from
the valve to the outside of the building with the end of the pipe not
more than two (2) feet (610 mm) nor less than six (6) inches (152 mm)
above the ground or the flood level of the area receiving the discharge
and pointing downward. Such drains may terminate at other approved
locations. No part of such drain pipe shall be trapped and the terminal
end of the drain pipe shall not be threaded.
EXCEPTION: Replacement water heating equipment shall only be required to provide a drain pointing downward from the relief valve to extend between two feet (610 mm) and six
inches (152 mm) from the floor. No additional floor drain need be provided.
[]
NEW SECTION
WAC 51-46-0609 Installation, testing, unions, and location.
609.6 Location. Except as provided in Section 609.7, no building supply
shall be located in any lot other than the lot which is the site of the
building or structure served by such building supply.
[]
NEW SECTION
WAC 51-46-0610 Size of potable water piping.
610.4 Where the maximum length of supply piping is two hundred (200)
feet (60,960 mm) or less, each water piping system of fifty (50) fixture
units or less shall be sized in accordance with the values set forth in
Table 6-5. Other systems of more than fifty (50) fixture units and
within the range of Table 6-3 may be sized from that table or by the
method set forth in Section 610.5.
Listed engineered parallel water distribution systems may be
installed in accordance with their listing.
[]
NEW SECTION
WAC 51-46-0700 Sanitary drainage.
[]
NEW SECTION
WAC 51-46-0701 Materials.
701.0 Materials.
701.1 Drainage piping shall be cast iron, galvanized steel, galvanized
wrought iron, lead, copper, brass, Schedule 40 ABS DWV, Schedule 40 PVC
DWV, extra strength vitrified clay pipe, or other approved materials
having a smooth and uniform bore, except that:
701.1.1 No galvanized wrought iron or galvanized steel pipe shall be
used underground and shall be kept at least six (6) inches (152 mm) above
ground.
701.1.2 No vitrified clay pipe or fittings shall be used above ground
or where pressurized by a pump or ejector. They shall be kept at least
twelve (12) inches (305 mm) below ground.
701.1.3 Copper tube for underground drainage and vent piping shall have
a weight of not less than that of copper drainage tube type DWV.
701.1.4 Copper tube for above ground drainage and vent piping shall have
a weight of not less than that of copper drainage tube type DWV.
[]
NEW SECTION
WAC 51-46-0704 Fixture connections (drainage).
704.3 Delete paragraph.
[]
NEW SECTION
WAC 51-46-0710 Drainage of fixtures located below the next upstream
manhole or below the main sewer level.
710.3 The minimum size of any pump or any discharge pipe from a sump
having a water closet connected thereto shall be not less than two (2)
inches (52 mm).
[]
NEW SECTION
WAC 51-46-0713 Building sewers.
Part II Building Sewers. Delete all of Part II, Sections 713 to 723, and
Tables 7-7 and 7-8.
[]
[Open Style:Columns Off]
NEW SECTION
WAC 51-46-0793 Table 7-3 Drainage fixture unit values.
[Open Style:Columns On]
[]
NEW SECTION
WAC 51-46-0800 Indirect wastes.
[]
NEW SECTION
WAC 51-46-0810 Steam and hot water drainage condensers and sumps.
810.4 Strainers. Every indirect waste interceptor receiving discharge
containing particles that would clog the receptor drain shall have a
readily removable dome strainer.
[]
NEW SECTION
WAC 51-46-0814 Refrigeration wastes.
814.0 Refrigeration Wastes.
For refrigeration wastes see Mechanical Code Section 1105.13.
[]
NEW SECTION
WAC 51-46-0815 Air-conditioning equipment.
815.0 Air-Conditioning Equipment.
815.1 Size. For sizing of equipment see Mechanical Code Table 11-E.
Air conditioning waste pipes shall be constructed of materials specified
in Chapter 7.
815.2 Point of Discharge. Air-conditioning condensate waste pipes shall
connect indirectly to the drainage system through an airgap or airbreak
to:
815.2.1 A properly trapped receptor; or
815.2.2 Other points of discharge acceptable to the Administrative
Authority, including dry wells, leach pits, the tailpiece of plumbing
fixtures, etc.
[]
NEW SECTION
WAC 51-46-0900 Vents.
[]
NEW SECTION
WAC 51-46-0903 Materials.
903.1.2 Delete paragraph.
[]
NEW SECTION
WAC 51-46-1000 Traps and interceptors.
[]
NEW SECTION
WAC 51-46-1003 Traps - Described.
1003.1 Each trap, except one for an interceptor or similar device shall
be self-cleaning. Traps for bathtubs, showers, lavatories, sinks,
laundry tubs, floor drains, hoppers, urinals, drinking fountains, dental
units, and similar fixtures shall be of standard design and weight and
shall be of ABS, cast brass, cast iron, lead, PP, PVC, or other approved
material. An exposed and readily accessible drawn brass tubing trap, not
less than 17 B&S Gauge (0.045 inch) (1.1 mm), may be used on fixtures
discharging domestic sewage but shall exclude urinals. Each trap shall
have the manufacturer's name stamped legibly in the metal of the trap and
each tubing trap shall have the gauge of the tubing in addition to the
manufacturer's name. Every trap shall have a smooth and uniform interior
waterway.
[]
NEW SECTION
WAC 51-46-1012 Laundries.
1012.0 Laundries. Delete entire Section.
[]
NEW SECTION
WAC 51-46-1300 Medical gas systems.
[]
OPTION 1 REPLACE ENTIRE CHAPTER WITH THE FOLLOWING:
NEW SECTION
WAC 51-46-1301 Scope.
1301.0 Scope
1301.1 The provisions herein shall apply to the design, installation,
testing, and certification of medical gas, medical vacuum systems, and
related equipment for safe use in patient care hospitals, clinics, and
other health care facilities.
1301.2 The purpose of this chapter is to provide minimum requirements
for the design, installation, testing, and certification of medical gas,
medical vacuum systems and related equipment.
1301.3 Medical gas and vacuum systems shall include, but not be limited
to, all distribution piping, supply manifolds, connections, regulators,
valves, alarms, sensors, compressors, pumps, and appurtenances.
[]
NEW SECTION
WAC 51-46-1302 Medical gases.
1302.0 Medical Gases
1302.1 Medical gas and medical vacuum systems shall be designed and
installed in accordance with the requirements of this chapter, the
installation requirements of this Code and 1996 NFPA 99, Chapters 2 & 4.
Installation and testing of medical gas and medical vacuum systems shall
be inspected by the Administrative Authority.
[]
NEW SECTION
WAC 51-46-1303 Plan review.
1303.0 Plan Review
1303.1 Before any medical gas or medical vacuum system is installed or
altered in any patient care hospital, clinic, or other health care
facility, duplicate plans and specifications shall be filed with the
Administrative Authority. Approval of the plans shall be obtained prior
to the issuance of any permit by the Administrative Authority.
1303.2 Plans and specifications submitted to the Administrative
Authority shall be of sufficient clarity to indicate the nature and
extent of the work proposed and show in detail that such work will
conform to the provisions of this Code and 1996 NFPA 99, Chapters 2 & 4.
[]
NEW SECTION
WAC 51-46-1304 System certification.
1304.0 System Certification.
1304.1 Prior to any medical gas system being placed in service, each and
every system shall be certified, as described in 1996 NFPA 99, Chapters
2 & 4, Gas and Vacuum Systems. This certification shall be accomplished
by an independent third party certification agency which is approved by
the Administrative Authority.
1304.2 A report which includes at least the specific items in 1996 NFPA
99, Chapters 2 & 4, Gas and Vacuum Systems, shall be furnished to the
Administrative Authority prior to final acceptance of the system.
[]
OPTION 2 REPLACE ENTIRE CHAPTER WITH THE FOLLOWING:
NEW SECTION
WAC 51-46-1301 Scope.
1301.0 Scope.
1301.1 The provisions herein shall apply to the design, installation,
testing, and verification of medical gas, medical vacuum systems, and
related permanent equipment for safe use in patient care hospitals,
clinics, and other heath care facilities.
1301.2 The purpose of this chapter is to provide minimum requirements
for the design, installation and verification of medical gas, medical
vacuum systems, and related permanent equipment.
[]
NEW SECTION
WAC 51-46-1302 Definitions.
1302.0 Definitions.
1302.1 Installer Performance Testing - Testing conducted by the
installer or representative prior to system verification using oil-free,
dry nitrogen as stated in Chapter 14.
1302.2 System Verification - Testing conducted by a qualified party
other than the installer or material vendor after the installer
performance testing and prior to the medical gas system being put into
service.
[]
NEW SECTION
WAC 51-46-1303 Plan review.
1303.0 Plan Review.
1303.1 Before any medical gas or medical vacuum system is installed or
altered in any patient care hospital, clinic, or health care facility,
duplicate plans and specifications shall be filed with the Administrative
Authority. The Administrative Authority shall approve the plans prior
to the issuance of any permit.
1303.2 Plans and specifications submitted to the Administrative
Authority shall be of sufficient clarity to indicate the nature and
extent of the work proposed and shown in detail that such work will
conform to the provisions of this Code, specifically Chapter 14 of this
Code.
[]
NEW SECTION
WAC 51-46-1304 System installation and performance testing.
1304.0 System Installation and Installer Performance Testing.
1304.1 Medical gas and medical vacuum systems shall be designed and
installed in accordance with the requirements of this Chapter and the
installation requirement of this Code, specifically Chapter 14 of this
Code.
1304.2 A report of completion of the installer performance testing which
includes the specific items in Chapter 14 shall be furnished to the
Administrative Authority prior to system verification.
[]
NEW SECTION
WAC 51-46-1305 System verification.
1305.0 System Verification.
1305.1 Prior to any medical gas system being placed in service, each and
every system shall be verified as described in Chapter 14. This
verification shall be accomplished by an independent third party
verification agency which is approved by the Administrative Authority.
1305.2 A report which includes at least the specific items in Chapter
14 shall be furnished to the Administrative Authority prior to final
acceptance of the system.
[]
NEW SECTION
WAC 51-46-1400 Referenced standards.
[]
NEW SECTION
WAC 51-46-1401 Referenced standards.
Title Page
Appliances and Appurtenances - Plumbing 130
Backflow Preventers (see Valves and Appurtenances)
Backwater Valves (see Interceptors and Backwater Valves)
Cleanouts (see Traps and Cleanouts)
Drainage System - Sanitary 131
Drains - Storm 137
Building - Below Ground 149
Interior - Above Ground 149
Drains - Subsoil 138
Fixtures and Trim - Plumbing 139
Hangers and Supports 142
Indirect Waste Piping and Special Wastes 142
Interceptors and Backwater Valves 146
Joining Materials and Methods
Medical Gas Piping 146
Sanitary Drainage Systems 135
Sanitary Vents 154
Storm Drains 150
Subsoil Drains 139
Water Supply System 160
Joining Methods - Indirect Waste Piping and Special Waste 145
Manholes 146
Medical Gas and Vacuum Systems 146
Miscellaneous 146
Pumps 147
Roof Drains 138
Sewer, Building (see Drainage System - Sanitary)
Sewer, Building Combined 148
Traps and Cleanouts 152
Valves and Appurtenances 159
Vents and Venting 153
Water Supply Systems 155
Wrapping and Coating 162
Footnotes to standards listed in Table 14-1 and abbreviations are at the
end of the table.
[]
[Open Style:Columns Off]
NEW SECTION
WAC 51-46-1491 Table 14-1 Standards for materials, equipment,
joints and connections.
[Open Style:Columns On]
[]
Reviser's note: The brackets and enclosed material in the text of
the above section occurred in the copy filed by the agency and appear in
the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-46-97120 Appendix M--Storm drainage.
[]
NEW SECTION
WAC 51-46-97121 General.
M 1.0 General.
M 1.1 Where Required. All roofs, paved areas, yards, courts, and
courtyards shall be drained into a separate storm sewer system, or into
a combined sewer system where a separate storm sewer system is not
available, or to some other place of disposal satisfactory to the
Administrative Authority. In the case of one- and two-family dwellings,
storm water may be discharged on flat areas such as streets or lawns so
long as the storm water shall flow away from the building and away from
adjoining property, and shall not create a nuisance.
M 1.2 Storm Water Drainage to Sanitary Sewer Prohibited. Storm water
shall not be drained into sewers intended for sanitary drainage only.
M 1.3 Material Uses. Rainwater piping placed within the interior of a
building or run within a vent or shaft shall be of cast iron, galvanized
steel, wrought iron, brass, copper, lead, Schedule 40 ABS DWV, Schedule
40 PVC DWV, or other approved materials, and changes in direction shall
conform to the requirements of Section 706.0.
M 1.4 Expansion Joints Required. Expansion joints or sleeves shall be
provided where warranted by temperature variations or physical
conditions.
M 1.5 Subsoil Drains.
M 1.5.1 Subsoil drains shall be provided around the perimeter of
buildings having basements, cellars, or crawl spaces or floors below
grade. Such subsoil drains may be positioned inside or outside of the
footing, shall be of perforated, or open-jointed approved drain tile or
pipe not less than three (3) inches (76 mm) in diameter, and shall be
laid in gravel, slag, crushed rock, approved three-quarter (3/4) inch
(19.1 mm) crushed recycled glass aggregate, or other approved porous
material with a minimum of four (4) inches (102 mm) surrounding the pipe
on all sides. Filter media shall be provided for exterior subsoil
piping.
M 1.5.2 Subsoil drains shall be piped to a storm drain, to an approved
water course, to the front street curb or gutter, or to an alley; or the
discharge from the subsoil drains shall be conveyed to the alley by a
concrete gutter. Where a continuously flowing spring or groundwater is
encountered, subsoil drains shall be piped to a storm drain or an
approved water course.
M 1.5.3 Where it is not possible to convey the drainage by gravity,
subsoil drains shall discharge to an accessible sump pit provided with
an approved automatic electric pump. A sump pit shall be at least
fifteen (15) inches (381 mm) in diameter, eighteen (18) inches (457 mm)
in depth, and provided with a fitted cover. The sump pump shall have an
adequate capacity to discharge all water coming into the sump as it
accumulates to the required discharge point, and the capacity of the pump
shall not be less than fifteen (15) gpm (1.0 L/s). The discharge piping
from the sump pump shall be a minimum of one and one-half (1-1/2) inches
(38 mm) in diameter and have a union to make the pump accessible for
servicing.
M 1.5.4 For separate dwellings not serving continuously flowing springs
or groundwater, the sump discharge pipe may discharge onto a concrete
splash block with a minimum length of twenty-four (24) inches (610 mm).
This pipe shall be within four (4) inches (102 mm) of the splash block
and positioned to direct the flow parallel to the recessed line of the
splash block.
M 1.5.5 Subsoil drains subject to backflow when discharging into a storm
drain shall be provided with a backwater valve in the drain line so
located as to be accessible for inspection and maintenance.
M 1.5.6 Nothing in Section M 1.5 shall prevent drains that serve either subsoil drains or areaways of a detached building from discharging to a properly graded open area, provided that:
(1) They do not serve continuously flowing springs or groundwater;
(2) The point of discharge is at least ten (10) feet (3048 mm) from any property line; and
(3) It is impracticable to discharge such drains to a storm drain,
to an approved water course, to the front street curb or gutter, or to
an alley.
M 1.6 Building Subdrains. Building subdrains located below the public
sewer level shall discharge into a sump or receiving tank, the contents
of which shall be automatically lifted and discharged into the drainage
system as required for building sumps.
M 1.7 Areaway Drains. All open subsurface space adjacent to a building,
serving as an entrance to the basement or cellar of a building, shall be
provided with a drain or drains. Such areaway drains shall be two (2)
inches (51 mm) minimum diameter for areaways not exceeding one hundred
(100) square feet (9.3 m2) in area, and shall be discharged in the manner
provided for subsoil drains not serving continuously flowing springs or
ground water (see Section M 1.5.2). Areaways in excess of one hundred
(100) square feet (9.3 m2) shall not drain into subsoil. Areaway drains
for areaways exceeding one hundred (100) square feet (9.3 m2) shall be
sized according to Table M-2.
M 1.8 Window Areaway Drains. Window areaways not exceeding ten (10)
square feet (0.9 m2) in area may discharge to the subsoil drains through
a two (2) inch (51 mm) pipe. However, window areaways exceeding ten (10)
square feet (0.9 m2) in area shall be handled in the manner provided for
entrance areaways (see Section M 1.7).
M 1.9 Filling Stations and Motor Vehicle Washing Establishments. Public
filling stations and motor vehicle washing establishments shall have the
paved area sloped toward sumps or gratings within the property lines.
Curbs not less than six (6) inches (152 mm) high shall be placed where
required to direct water to gratings or sumps.
M 1.10 Paved Areas. Where the occupant creates surface water drainage,
the sumps, gratings or floor drains shall be piped to a storm drain or
an approved water course.
M 1.11 Roof Drainage.
M 1.11.1 Primary Roof Drainage. Roof areas of a building shall be
drained by roof drains or gutters. The location and sizing of drains and
gutters shall be coordinated with the structural design and pitch of the
roof. Unless otherwise required by the Administrative Authority, roof
drains, gutters, vertical conductors or leaders, and horizontal storm
drains for primary drainage shall be sized based on a storm of sixty (60)
minutes duration and 100-year return period (see Appendix D).
M 1.11.2 Secondary Roof Drainage.
M 1.11.2.1 Where parapet walls or other construction extend above the
roof and create areas where storm water would become trapped if the
primary roof drainage system failed to provide sufficient drainage, an
independent secondary roof drainage system consisting of scuppers,
standpipes, or roof drains shall be provided. Secondary roof drainage
systems shall be sized in accordance with Section M 1.11.1 of this Code.
Overflow drains shall be the same size as the roof drains with the inlet
flow line two (2) inches (51 mm) above the low point of the roof and
shall be installed independent from the roof drains.
M 1.11.2.2 Where secondary roof drainage is provided by means of roof
drains or standpipes, the secondary system shall be separate from the
primary system and shall discharge independently at grade or other
approved point of discharge.
EXCEPTION: Storm drain overflows may be connected to the vertical riser for the roof drain.
M 1.11.2.3 Where secondary roof drainage is provided, the overflow
level(s) into the secondary system shall be determined by the structural
design of the roof, including roof deflection, at a level not less than
two (2) inches (51 mm) above the level of the primary drain. An
allowance shall be made to account for the required overflow head of
water above the secondary inlets. The elevation of the secondary inlet
plus the required overflow head shall not exceed the maximum allowable
water level on the roof.
M 1.11.2.4 Scuppers shall be sized as rectangular weirs, using hydraulic
principles to determine the required length and resulting overflow head
(see Appendix D). Secondary roof drains and standpipes shall be sized
according to Table M-1. Where standpipes are used, the head allowance
required under Section M 1.11.2.3 shall be not less than one and one-half
(1-1/2) inches (38 mm).
M 1.11.3 Equivalent Systems. When approved by the Administrative
Authority, the requirements of Sections M 1.11.1 and M 1.11.2 shall not
preclude the installation of an engineered roof drainage system that has
sufficient capacity to prevent water from ponding on the roof in excess
of that allowed in the roof structural design with a rainfall rate of at
least twice that for a 100-year, 60-minute storm and with a blockage in
any single point in the storm drainage system.
M 1.12 Cleanouts.
M 1.12.1 Cleanouts for building storm drains shall comply with the
requirements of this Section. Rain leaders and conductors connected to
a building storm sewer shall have a cleanout installed at the base of the
outside leader or outside conductor before it connects to the horizontal
drain. Cleanouts shall be placed inside the building near the connection
between the building drain and the building sewer or installed outside
the building at the lower end of the building drain and extended to
grade.
M 1.12.2 Each cleanout shall be installed so that it opens to allow
cleaning in the direction of flow of the soil or waste or at right angles
thereto, and except in the case of wye branch and end-of-line cleanouts,
shall be installed vertically above the flow line of the pipe.
M 1.12.3 Cleanouts installed under concrete or asphalt paving shall be
made accessible by yard boxes, or extending flush with paving with
approved materials and be adequately protected.
M 1.12.4 Approved manholes may be installed in lieu of cleanouts when
first approved by the Administrative Authority. The maximum distance
between manholes shall not exceed three hundred (300) feet (91.4 m).
The inlet and outlet connections shall be made by the use of a
flexible compression joint no closer than twelve (12) inches (305 mm) to,
and not farther than three (3) feet (914 mm) from the manhole. No
flexible compression joints shall be embedded in the manhole base.
M 1.13 All rainwater sumps serving "public use" occupancy buildings
shall be provided with dual pumps arranged to function alternately in
case of overload of mechanical failure.
[]
NEW SECTION
WAC 51-46-97122 Materials.
M 2.0 Materials.
M 2.1 Conductors.
M 2.1.1 Conductors installed aboveground in buildings shall be
constructed of materials specified in Table 14-1.
M 2.1.2 The inside of conductors installed above ground level shall be
of seamless copper water tube, Type K, L or M; Schedule 40 copper pipe
or Schedule 40 copper alloy pipe; Type DWV copper drainage tube; service
weight cast iron soil pipe or hubless cast iron soil pipe; standard
weight galvanized steel pipe; or Schedule 40 ABS or Schedule 40 PVC
plastic pipe.
M 2.2 Leaders.
M 2.2.1 Leaders shall be constructed of materials specified in Table 14-1.
M 2.2.2 Leaders shall be of seamless copper water tube, Type K, L or M;
Schedule 40 copper pipe; Schedule 40 copper alloy pipe; type DWV copper
drainage tube; service weight cast iron soil pipe or hubless cast iron
soil pipe; galvanized steel sheet metal or copper sheet metal; standard
weight galvanized steel pipe; Class DL or XL lead pipe; or Schedule 40
ABS or Schedule 40 PVC plastic pipe.
M 2.3 Underground Building Storm Drains. All underground building storm
drains shall be constructed of materials specified in Table 14-1.
M 2.4 Building Storm Sewers. Building storm sewers shall be constructed
of materials specified in Table 14-1.
M 2.5 Subsoil Drains.
M 2.5.1 Subsoil drains shall be constructed of materials specified in
Table 14-1.
M 2.5.2 Subsoil drains shall be open-jointed or of perforated pipe,
vitrified clay, plastic, cast iron, or porous concrete.
[]
NEW SECTION
WAC 51-46-97123 Traps on storm drains and leaders.
M 3.0 Traps on Storm Drains and Leaders.
M 3.1 Where Required. Leaders and storm drains, when connected to a
combined sewer, shall be trapped. Floor and area drains connected to a
storm drain shall be trapped.
EXCEPTION: Traps shall not be required where roof drains, rain leaders and other inlets are at locations allowed under Section 906.0, Vent Terminals.
M 3.2 Where Not Required. No trap shall be required for a leader(s) or
conductor(s) which is connected to a sewer carrying storm water
exclusively.
M 3.3 Trap Size. Traps, when installed for individual conductors, shall
be the same size as the horizontal drain to which they are connected.
M 3.4 Method of Installation of Combined Sewer. Individual storm-water
traps shall be installed on the storm-water drain branch serving each
storm-water inlet, or a single trap shall be installed in the main storm
drain just before its connection with the combined building sewer. Such
traps shall be provided with an accessible cleanout on the outlet side
of the trap.
[]
NEW SECTION
WAC 51-46-97124 Leaders, conductors, and connections.
M 4.0 Leaders, Conductors, and Connections.
M 4.1 Improper Use. Leaders or conductors shall not be used as soil,
waste, or vent pipes, nor shall soil, waste, or vent pipes be used as
leaders or conductors.
M 4.2 Protection of Leaders. Leaders installed along alleyways,
driveways, or other locations where they may be exposed to damage shall
be protected by metal guards, recessed into the wall, or constructed from
ferrous pipe.
M 4.3 Combining Storm with Sanitary Drainage. The sanitary and storm
drainage system of a building shall be entirely separate, except where
a combined sewer is used, in which case the building storm drain shall
be connected in the same horizontal plane through single wye fittings to
the combined building sewer at least ten (10) feet (3048 mm) downstream
from any soil stack.
[]
NEW SECTION
WAC 51-46-97125 Roof drains.
M 5.0 Roof Drains.
M 5.1 Material.
M 5.1.1 Roof drains shall be constructed of materials specified in Table
14-1.
M 5.1.2 Roof drains shall be of cast iron, copper or copper alloy, lead
or plastic.
M 5.2 Dome or Strainer for General Use. All roof drains and overflow
drains, except those draining to hanging gutters, shall be equipped with
strainers extending not less than four (4) inches (102 mm) above the
surface of the roof immediately adjacent to the drain. Strainers shall
have a minimum inlet area above the roof level of not less than one and
one-half (1-1/2) times the area of the conductor or leader to which the
drain is connected.
M 5.3 Strainers for Flat Decks. Roof drain strainers for use on sun
decks, parking decks, and similar areas which are normally serviced and
maintained may be of the flat surface-type. Such roof drain strainers
shall be level with the deck and shall have an available inlet area of
no less than two (2) times the area of the conductor or leader to which
the drain is connected.
M 5.4 Roof Drain Flashings. Connection between the roof and roof drains
which pass through the roof and into the interior of the building shall
be made watertight by the use of proper flashing material.
M 5.4.1 Where lead flashing material is used, it shall be a minimum of
four (4) pounds per square foot (19.5 kg/m2).
M 5.4.2 Where copper flashing material is used, it shall be a minimum
of twelve (12) ounces per square foot (3.7 kg/m2).
[]
NEW SECTION
WAC 51-46-97126 Size of leaders, conductors, and storm drains.
M 6.0 Size of Leaders, Conductors, and Storm Drains.
M 6.1 Vertical Conductors and Leaders. Vertical conductors and leaders
shall be sized on the basis of the maximum projected roof area and Table
M-1.
M 6.2 Size of Horizontal Storm Drains and Sewers. The size of building
storm drains or building storm sewers or any of their horizontal branches
shall be based upon the maximum projected roof or paved area to be
handled and Table M-2.
M 6.3 Size of Roof Gutters. The size of semicircular gutters shall be
based on the maximum projected roof area and Table M-3.
M 6.4 Side Walls Draining onto a Roof. Where vertical walls project
above a roof so as to permit storm water to drain to the roof area below
the adjacent roof area may be computed from Table M-1 as follows:
(1) For one (1) wall - add fifty (50) percent of the wall area to
the roof area figures.
(2) For two (2) adjacent walls - add thirty-five (35) percent of the
total wall areas.
(3) Two (2) walls opposite of same height - add no additional area.
(4) Two (2) walls opposite of differing heights - add fifty (50)
percent of wall area above top of lower wall.
(5) Walls on three (3) sides - add fifty (50) percent of area of the
inner wall below the top of the lowest wall, plus allowance for the area
of wall above top of lowest wall, per (2) and (4) above.
(6) Walls on four (4) sides - no allowance for wall areas below top
of lowest wall - add for areas above the top of the lowest wall per (1),
(2), (4) and (5) above.
[]
NEW SECTION
WAC 51-46-97127 Values for continuous flow.
M 7.0 Values for Continuous Flow.
Where there is a continuous or semi-continuous discharge into the
building storm drain or building storm sewer, as from a pump, ejector,
air-conditioning plant, or similar device, one (1) gpm (3.8 L/min.) of
such discharge shall be computed as being equivalent to twenty-four (24)
square feet (2.2 m2) of roof area, based upon a rate of rainfall of four
(4) inches (102 mm) per hour.
[]
NEW SECTION
WAC 51-46-97128 Testing.
M 8.0 Testing.
M 8.1 Testing Required. New building storm drainage systems and parts
of existing systems that have been altered, extended or repaired shall
be tested as described in Section M 8.2.1 to disclose leaks and defects.
M 8.2 Methods of Testing Storm Drainage Systems. Except for outside
leaders and perforated or open jointed drain tile, the piping of storm
drain systems shall be tested upon completion of the rough piping
installation by water or air, and proved tight. The Administrative
Authority may require the removal of any cleanout plugs to ascertain if
the pressure has reached all parts of the system. Either of the
following test methods shall be used:
M 8.2.1 Water Test. After piping has been installed, the water test
shall be applied to the drainage system, either in its entirety or in
sections. If applied to the entire system, all openings in the piping
shall be tightly closed except for the highest opening, and the system
shall be filled with water to the point of overflow. If the system is
tested in sections, each opening shall be tightly plugged except for the
highest opening of the section under test, and each section shall be
filled with water, but no section shall be tested with less than a ten
(10) foot (3048 mm) head of water. In testing successive sections, at
least the upper ten (10) foot (3048 mm) of the next preceding section
shall be tested so that no joint of pipe in the building (except the
uppermost ten (10) foot (3048 mm) of a roof drainage system, which shall
be filled with water to the flood level of the uppermost roof drain)
shall have been submitted to a test of less than a ten (10) foot (3048
mm) head of water. The water shall be kept in the system or in the
portion under test for at least fifteen (15) minutes before inspection
starts; the system shall then be tight at all points.
M 8.2.2 Air Test. The air test shall be made by attaching an air
compressor testing apparatus to any suitable opening after closing all
other inlets and outlets to the system, forcing air into the system until
there is a uniform gage pressure of five (5) psi (34.5 kPa) or sufficient
to balance a column of mercury ten (10) inches (254 mm) in height. This
pressure shall be held without introduction of additional air for a
period of at least fifteen (15) minutes.
M 8.2.3 Exceptions. When circumstances exist that make air and water
tests, described in Sections M 8.2.1 and M 8.2.2 above, impractical, and
for minor maintenance, repairs and installations, the Administrative
Authority may perform the inspection as considered advisable by said
authority to assure that the work has been in accordance with provisions
of this Code.
[]
[Open Style:Columns Off]
NEW SECTION
WAC 51-46-97129 Tables M-1 through M-3.
[Open Style:Columns On]
[]
STATE BUILDING CODE ADOPTION OF APPENDIX I OF THE 1997 EDITION OF THE
UNIFORM PLUMBING CODE
NEW SECTION
WAC 51-47-001 Authority. These rules are adopted under the
authority of chapter 19.27 RCW.
[]
NEW SECTION
WAC 51-47-002 Purpose. The purpose of these rules is to implement
the provisions of chapter 19.27 RCW, which provides that the State
Building Code council shall maintain the State Building Code in a status
which is consistent with the purpose as set forth in RCW 19.27.020. In
maintaining the codes, the council shall regularly review updated
versions of the codes adopted under the act, and other pertinent
information, and shall amend the codes as deemed appropriate by the
council.
[]
NEW SECTION
WAC 51-47-003 Uniform plumbing code standards. The 1997 edition
of the Uniform Plumbing Code Standards (Appendix I), published by the
International Association of Plumbing and Mechanical Officials is hereby
adopted by reference.
[]
NEW SECTION
WAC 51-47-007 Exceptions. The exceptions and amendments to the
Uniform Codes contained in the provisions of chapter 19.27 RCW shall
apply in cases of conflict with any of the provisions of these rules.
[]
NEW SECTION
WAC 51-47-008 Implementation. The Uniform Plumbing Code Standards
adopted by chapter 19.27 RCW shall become effective in all counties and
cities of this state on July 1, 1998, unless local government residential
amendments have been approved by the State Building Code council.
[]